Bump org.springframework.boot from 3.4.0-M2 to 3.4.0-M3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.4.0-M2 to 3.4.0-M3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.4.0-M2...v3.4.0-M3)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -1,7 +1,7 @@
 import io.freefair.gradle.plugins.okhttp.tasks.UploadFile
 
 plugins {
-    id "org.springframework.boot" version "3.4.0-M2" apply false
+    id "org.springframework.boot" version "3.4.0-M3" apply false
     id "io.github.gradle-nexus.publish-plugin" version "2.0.0"
     id "io.freefair.git-version"
     id "io.freefair.okhttp"